CN103898425B - A kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire - Google Patents
A kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire Download PDFInfo
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Abstract
The present invention relates to a kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire, belong to non-ferrous metal Field of Heat-treatment。The method, by the wire rod of Cu-Cr-Zr system alloy, uses as raw material line base；Carry out solution treatment；Multi-pass is cold drawn pulls into dish line；Single-stage or multistage aging process；One round or many rounds continuous cold are processed and annealing。The method is applicable to Cr content 0.15～0.6wt.%, Zr content 0.03～0.4wt.%, the four, the 5th constituent element (Sn, Si, Ag, RE etc.) content 0.01～0.1wt.%, and surplus is the preparation processing of the multiple low alloying ultra-fine wire rod of Cu-Cr-Zr-X alloy of Cu。This invention simplifies the preparation processing technique of ageing strengthening type alloy wire, while saving material and the energy, ensure that the stability of wire quality, the use needs of multi-field different combination property cable can be met。
Description
Technical field
The present invention relates to a kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire, be particularly suited for the compound thermomechanical treatment of the high strength & high electric-conduction Cu-Cr-Zr system ultra-fine wire rod of alloy, belong to non-ferrous metal Field of Heat-treatment。
Background technology
The high-end cable that the high-tech sectors such as Aero-Space, automobile, electronics, new forms of energy use is a kind of important accurate conductor, it is characterized in that the high property copper alloy of thin footpath overlength or the electroplated single line made of Cu-base composites or twisted wire, and at outer layer covers polymeric dielectric layer and metal screen layer, there is significantly high electric conductivity, higher intensity, good plasticity, high temperature resistant, oxidation resistance is strong。It is a kind of indispensable basic material being widely used in high-tech sector, undertakes the electric current transmission under special environment and signal transmitting effect。
International high-end electric wire core alloy conductor material includes Kufil, copper magnesium alloy, signal bronze, copper zirconium alloy, chromiumcopper, Cu-Cr-Zr alloy, copper beryllium alloy, copper nickel-beryllium alloy, copper ferrophosphor(us), corson alloy, adonic, tin-phosphor bronze, silicon bronze, complex brass etc.。The bianry alloy such as copper silver, copper magnesium, copper stannum is easily prepared, cheap, but combination property is relatively low。Ageing strengthening type alloy system ratios in the application of lead frame and elastic element such as copper ferrum phosphorus, copper nisiloy and cuprum-nickel-stannum are wide, but generally on the low side as its electric conductivity of conductor material, can only be applied at some specific area。And for bronze and brass alloys, its range of application is then more special, do not use within the scope of conventional conductive capability。
Chrome zirconium copper alloy contrasts above-mentioned each alloy system and has obvious combination property advantage, high-strength highly-conductive truly can be realized, harmony due to its intensity and electric conductivity so that it is can be applied in various fields, becomes the focus that countries in the world are competitively studied。According to the characteristic of this alloy system, it can as materials'uses such as large-scale integrated circuit lead frame, high-speed rail transportation aerial condutor, conticaster crystallizer liner, resistance welding electrode, electrical contact, wires。Concentrate on alloy plate strip, the preparation processing of bar and heat treatment aspect currently, with respect to the academic research of this alloy system and patent content, and the content for alloy ultra-fine wire rod process and heat treatment means is comparatively deficient。
Summary of the invention
The main purpose of the present invention is to provide a kind of compound deformation heat treatment method suitable in the ultra-fine wire rod of Cu-Cr-Zr series copper alloy, the combination property that can be made alloy wire by the method reaches higher level, and can combine with the industrial manufacture process of conductor wires, meet the requirement of large-scale continuous production。
The processing characteristics of the ultra-fine wire rod of chrome zirconium copper alloy has bigger difference with heat treating regime and Strip, bar, essentially consists in gauge or diameter of wire less than after 0.5mm, and the impact of cold deformation alloy thermal effectiveness and combination property is more significantly。When identical thermomechanical treatment, notable difference is all there is in the intensity of ultra-fine wire rod, plasticity and electric conductivity compared with strip bar, namely being applicable to the general deformation of strip bar and single-stage or two-stage time effect system is not necessarily suitable ultra-fine wire rod, the combination property obtained does not have concordance yet。In actual production, the length of wires of a diameter 0.1mm is up to more than 500km, therefore the seriality of preparation technology is required higher by the commercial production of ultra-fine wire rod, the alloy wire base of major diameter need to experience the online drawing of continuous print, plating, annealing and stranding process, for ageing strengthening type alloy wire, the Technologies for Heating Processing such as its solid solution and timeliness should carry out in larger diameter state, otherwise the scalable interval making properties of product is diminished, and fine rule heat treatment can make the process such as heating, quenching complicate, easily aoxidize, break, coating adhesion, the situation such as pollution。It addition, heat treatment can ensure that the follow-up preparation course of processing continuously performs under major diameter state, need exist for being suitable for wire rod in the case and prepare the deformation heat treatment method of processing technique。
High-tech sector to the requirement of high-end cable core conductor far above general civilian level, generally require close with pure cu conductor electric conductivity while, intensity reaches more than the twice of pure cu conductor and keeps certain elongation percentage。Reach such effect, several conventional intensifying method reasonable coordination of precipitation strength type alloy must be used。Chrome zirconium copper alloy is after conventional solid solution+Ageing Treatment, promote while can realizing intensity and electric conductivity, but the lifting limited extent of intensity, the means reasonable utilization such as solution strengthening, refined crystalline strengthening, working hardening it are difficult to the purpose of high-strength highly-conductive, as can be made material obtain the electric conductivity that higher intensity also can keep higher in precipitation strength process。Thermal processing distortion can improve organizational structure, cold deformation can manufacture high density dislocation in alloy structure, experience heat before carrying out solution treatment respectively, cold two kinds of plastic histories can increase the consistency of ingot blank and refine thick as-cast structure, form the defects such as a large amount of room and dislocation, when solution treatment, solute atoms rapidly and evenly can be solid-solution in Cu matrix by the passage that defect is formed, obtain good solid solution effect, which dictates that the lifting effect of combination property in follow-up ageing process。After solid solution, alloy imposes cold deformation and can provide place and passage for the forming core of precipitated phase in ag(e)ing process equally, is conducive to precipitated phase to precipitate out and Dispersed precipitate, thus obtaining high strength & high electric-conduction energy。Can also be regulated and controled by the number of times alloy tissue of timeliness and performance after controlling deformation, reach the Optimum Matching of tensile strength and conductivity。Cu-Cr-Zr alloy adds the 4th and above constituent element element, can further improve the combination property of alloy, solution strengthening effect can be played with the element S n of solid solution atom form strengthened copper alloy, Zn, Al, Ag, Si etc., improve alloy strength further, and have the effect hindering Cr atoms permeating, suppressing Cr phase to grow up, it is possible to increase the high-temperature stability of alloy；The interpolation of appropriate RE element can not only play the effect purifying alloy structure and remove impurity, moreover it is possible to plays refined crystalline strengthening effect。The common pathway of all above strengthening means is all manufacture crystal defect, hinders dislocation motion to carry out strengthening metal material with crystal defect, therefore in practical application, the intensity of metal material is exactly substantially the resistance of metallic crystal internal constraint dislocation motion。These defects all can cause the decline of alloy conductive performance, result of calculation shows, the distortion of lattice that the precipitation phase particle of Precipitation causes is more much smaller than the scattering process that solid solution atom in matrix causes to the scattering process of electronics, therefore after solute atoms precipitation, the electric conductivity of alloy increases。Moreover, copper alloy carries out Ageing Treatment after solution hardening can also discharge the strain energy stored in the course of processing, improves the microstructure morphology of material, adjusts or change the preferred orientation of material, their comprehensive function is to make alloy strength, hardness be improved, and electrical conductivity is recovered。The cold deformation course of processing can produce substantial amounts of heat, a part makes alloy generating portion reply and dynamic recrystallization, another part will be present in alloy with the form of deformation energy, this makes occur a large amount of defect and machining stress in alloy, owing to its strong scattering process brought makes alloy electrical conductivity degradation, but defect and strain energy are conducive to solute atoms to precipitate out from supersaturated solid solution, fault location easily becomes the region of first forming core, along with ag(e)ing process, the ageing strengthening effect of big cold deformation copper alloy becomes apparent from, and electrical conductivity improves more notable。During refined crystalline strengthening, the conductivity of crystal is unrelated with orientation, the increase of grain boundary area, the electrical conductivity of copper alloy will not be caused big impact。
The present invention is according to the mechanism of various strengthenings and conduction and method, process and heat treatment characteristic for ultra-fine wire rod develops a kind of compound deformation heat treatment method suitable in Cu-Cr-Zr series copper alloy, can obtain different types of novel high-strength high-conductivity copper alloy conductor material。
The present invention is applicable to the compound deformation heat treatment method of Cu-Cr-Zr series copper alloy, it is the Cu-Cr-Zr series copper alloy after solution treatment carries out cold deformation largely process, subsequently it is carried out single-stage or multistage aging processes, higher intensity is obtained while making alloy conductive performance be greatly improved, make intensity improve further again through continuous cold deformation processing, realize the intensity of wire rod by multistage continuous annealing, elongation percentage, electrical conductivity are in optimal synthesis state and make wire rod reach finished size。
A kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire, comprises the steps:
(1) by the wire rod of Cu-Cr-Zr system alloy, use as raw material line base；
(2) raw material line base is carried out solution treatment；
(3) the raw material line base after solution treatment pulls into dish line through multi-pass is cold drawn；
(4) hard state dish line is carried out single-stage or multistage aging processes；Then visual application requires to select electroless plating or continuous electroplating silver (nickel)；
(5) the dish line after timeliness or timeliness are electroplated is carried out a round or the processing of many rounds continuous cold and annealing。
In step (1), in described Cu-Cr-Zr system alloy, Cr content is 0.15～0.6wt.%, Zr content is 0.03～0.4wt.%, and surplus is Cu。Described Cu-Cr-Zr system alloy can also be multiple low alloying Cu-Cr-Zr-X alloy, Cr content is 0.15～0.6wt.%, Zr content is 0.03～0.4wt.%, X that is the 4th and/or the 5th constituent element are Sn, Si, Ag, RE(rare earth element) etc. in one or more, its content is 0.01～0.1wt.%, and surplus is Cu。
In step (1), raw material line base (wire rod) cross-sectional diameter is typically in more than 6mm。By manufacturing process such as extruding, drawings, Cu-Cr-Zr system alloy can also be made wire rod, it is ensured that its cold deformation is more than 50%, and wire rod cross-sectional diameter is typically in more than 6mm, use as raw material line base。
In step (2), the solid solubility temperature of raw material line base between 940～960 DEG C, temperature retention time between 0.5～1h, then hardening。
In step (3), the raw material line base after solid solution is more than 85% through multi-pass cold drawing to machining deformation amount, and pass deformation is 10～20%。
In step (4), Ageing Treatment scheme is determined according to alloying component and proportioning, when in alloy alloy element mass percent sum Cr+Zr+X when below 0.4wt.% and chromium zirconium mass ratio Cr/Zr are between 4～6, carry out single-stage aging process, aging temp is between 400～550 DEG C, aging time 1～4h, air cooling；When in alloy alloy element mass percent sum Cr+Zr+X more than 0.4wt.% or chromium zirconium mass ratio Cr/Zr less than 4 time, carry out two-stage time effect process, first aging temp is 380～420 DEG C, temperature retention time is 8～16h, air cooling, the aging temp of secondary is 450～480 DEG C, and temperature retention time is 1～4h, air cooling。
In step (4), after carrying out single-stage or multistage aging process, increase the step that dish line is carried out electrosilvering or nickel etc.。Can choose whether to need plating according to concrete application requirement, as wire surface need to have coating, dish line can be carried out continuous electroplating silver or nickel, make silver-plated or nickel the multiple low alloying ultra-fine wire rod of Cu-Cr-Zr-X alloy。
In step (5), depending on end properties requirement, the dish line after timeliness, plating is carried out a round or the processing of many rounds continuous cold and anneals。The continuous cold of the every round of dish line after timeliness is processed as to be processed to deflection more than 60% on continuous drawing machine; pass deformation is 5～10%; the annealing furnace (such as tube furnace) making blanketing with inert gas is annealed 400～550 DEG C of on-line continuous; wire rod is 1～3s through the time of body of heater uniform temperature zone; it is unable to reach finished size such as single-wheel time mechanical refining technique and performance requirement then should carry out the mechanical refining of many rounds, reach finished size requirement until repeated multiple times。
The compound deformation heat treatment method of the present invention is applicable to Cr content 0.15～0.6wt.%, Zr content 0.03～0.4wt.%, the four, the 5th constituent element (Sn, Si, Ag, RE etc.) content 0.01～0.1wt.%, surplus are the preparation processing of the multiple low alloying ultra-fine wire rod of Cu-Cr-Zr-X alloy of Cu。
The advantage of this method is, the bar of processing state makes alloy element be substantially dissolved in Copper substrate through rational solution treatment, in crystal, various defects are eliminated, regain uniform equi-axed crystal, then through a large amount of defect of cold deformation manufacture largely, increase substantially to precipitate out for precipitated phase while alloy strength and passage is provided, make follow-up single-stage or multistage aging tissue are more prone to tiny and Dispersed precipitate precipitated phase, make that intensity slightly reduces and electric conductivity is greatly improved。Owing to now having been completed ageing strengthening process, subsequent preparation process is without using the Technology for Heating Processing of discontinuity, can be implemented in line Continuous maching heat treatment, and this burning optimization on line temperature height time is short, new Precipitation phase will not be produced, simply play the annealing effect eliminating drawing stress, thus without the atmosphere of holding furnace and environment are strictly controlled。The continuous plating process of wire rod can carry out after Ageing Treatment, so can be prevented effectively from the generation of the problems such as coating oxidation, adhesion。This process simplify the preparation processing technique of ageing strengthening type alloy wire, while saving material and the energy, ensure that the quality stability of wire rod。The ultra-fine wire strength of alloy prepared by the method up to 430～690MPa, elongation percentage generally more than 6%, corresponding conductivity up to 97%～70%IACS, the use needs of multi-field different combination property wire rod can be met。
Detailed description of the invention
Below by way of instantiation, technical scheme is further described, but is not meant to limiting the scope of the invention。
A kind of compound deformation heat treatment method suitable in Cu-Cr-Zr system alloy wire, comprises the steps:
(1) by the wire rod of Cu-Cr-Zr system alloy, using as raw material line base, wire rod cross-sectional diameter is typically in more than 6mm；Or by manufacturing process such as extruding, drawings, Cu-Cr-Zr system alloy made wire rod, it is ensured that cold deformation is more than 50%, and wire rod cross-sectional diameter is typically in more than 6mm, use as raw material line base；
(2) quench after raw material line base is incubated at 940～960 DEG C 0.5～1h；
(3) through multi-pass cold drawing to deflection be more than 85%, pass deformation about about 10～20%；
(4) Ageing Treatment scheme is determined according to alloying component and proportioning, when in alloy alloy element mass percent sum Cr+Zr+X when below 0.4wt.% and chromium zirconium mass ratio Cr/Zr are between 4～6, carry out single-stage aging process, aging temp is between 400～550 DEG C, aging time 1～4h, air cooling；When in alloy alloy element mass percent sum Cr+Zr+X more than 0.4wt.% or chromium zirconium mass ratio Cr/Zr less than 4 time, carry out two-stage time effect process, first aging temp is 380～420 DEG C, temperature retention time is 8～16h, air cooling, the aging temp of secondary is 450～480 DEG C, and temperature retention time is 1～4h, air cooling；Choose whether to need plating according to application requirement, as needed coating that the dish line after timeliness can carry out continuous electroplating silver or nickel。
(5) wire rod after timeliness being electroplated is processed to deflection more than 60% on continuous drawing machine; pass deformation is about 5～10%; the annealing furnace (such as tube furnace) making blanketing with inert gas is annealed 400～550 DEG C of on-line continuous; wire rod is 1～3s through the time of body of heater uniform temperature zone, repeated multiple times until reaching finished size。
Embodiment 1:
Taking Φ 10mmCu-0.3wt.%Cr-0.1wt.%Zr alloy wire rod 1kg, carry out solution treatment in resistance furnace, solid solubility temperature is 950 DEG C, and temperature retention time is 1h, hardening；Wire rod after solid solution is cold drawn to Φ 2mm, and deflection is 96%, pass deformation 12～18%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out an Ageing Treatment, aging temp is 400 DEG C, is incubated 10h, and air cooling is to room temperature, then is carried out secondary ageing process, and aging temp is 450 DEG C, and temperature retention time is 1.5h, and air cooling is to room temperature；Being drawn to Φ 0.8mm through 11 passages on continuous drawing machine, deflection is 87.75%, pass deformation 5～8%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 450 DEG C and stops 3s；Continuous electroplating silver；Being drawn to Φ 0.3mm through 11 passages on continuous drawing machine again, deflection is 86%, and argon shield is annealed online, and annealing temperature is 450 DEG C and stops 3s；Repeating above-mentioned continuous drawing technique until being drawn to Φ 0.04mm, argon shield is annealed online, and annealing temperature is 490 DEG C and stops 1s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 505MPa, elongation percentage be 6.1%, electrical conductivity is the Φ 0.04mm silver-plated copper Cr-Zr alloy wire rod of 90.0%IACS。
Embodiment 2
Taking Φ 10mmCu-0.6wt.%Cr-0.06wt.%Zr alloy wire rod 10kg, carry out solution treatment in resistance furnace, solid solubility temperature is 960 DEG C, and temperature retention time is 1h, hardening；Wire rod after solid solution is cold drawn to Φ 1.14mm, and deflection is 98.7%, pass deformation 11～15%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out an Ageing Treatment, aging temp is 420 DEG C, is incubated 15h, and air cooling is to room temperature, then is carried out secondary ageing process, and aging temp is 475 DEG C, and temperature retention time is 3h, and air cooling is to room temperature；Continuous electroplating silver；Being drawn to Φ 0.7mm through 6 passages on continuous drawing machine again, deflection is 62.3%, pass deformation 5～8%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 400 DEG C and stops 1s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 679MPa, elongation percentage be 6.8%, electrical conductivity is the Φ 0.7mm silver-plated copper Cr-Zr alloy wire rod of 78%IACS。
Embodiment 3
Taking Φ 6mmCu-0.2wt.%Cr-0.05wt.%Zr-0.05wt.%Sn alloy wire rod 5kg, carry out solution treatment in resistance furnace, solid solubility temperature is 940 DEG C, and temperature retention time is 45min, hardening；Wire rod after solid solution is cold drawn to Φ 1mm, and deflection is 97.2%, pass deformation 12～18%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out Ageing Treatment, aging temp is 475 DEG C, is incubated 3h, and air cooling is to room temperature；Continuous electroplating nickel；Being drawn to Φ 0.2mm on continuous drawing machine, deflection is 96%, pass deformation 5～8%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 520 DEG C and stops 2s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 449MPa, elongation percentage be 8.1%, electrical conductivity is the Φ 0.2mm nickel-clad copper chromium zircaloy wire rod of 85.5%IACS。
Embodiment 4
Taking Φ 6mmCu-0.45wt.%Cr-0.2wt.%Zr-0.1wt.%Ag alloy wire rod 2kg, carry out solution treatment in resistance furnace, solid solubility temperature is 940 DEG C, and temperature retention time is 50min, hardening；Wire rod after solid solution is cold drawn to Φ 1mm, and deflection is 97.2%, pass deformation 10～15%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out an Ageing Treatment, aging temp is 390 DEG C, is incubated 16h, and air cooling is to room temperature, then is carried out secondary ageing process, and aging temp is 470 DEG C, and temperature retention time is 2h, and air cooling is to room temperature；Continuous electroplating silver；Being drawn to Φ 0.1mm again on continuous drawing machine, deflection is 99%, pass deformation 5～10%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 550 DEG C and stops 1s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 476MPa, elongation percentage be 7.2%, electrical conductivity is the Φ 0.1mm silver-plated copper chromium zirconium silver alloy wire rod of 91.4%IACS。
Embodiment 5
Taking Φ 10mmCu-0.28wt.%Cr-0.08wt.%Zr-0.1wt.%Ag-0.015wt.%RE alloy wire rod 5kg, carry out solution treatment in resistance furnace, solid solubility temperature is 950 DEG C, and temperature retention time is 1h, hardening；Wire rod after solid solution is cold drawn to Φ 2mm, and deflection is 96%, pass deformation 14～20%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out an Ageing Treatment, aging temp is 420 DEG C, is incubated 10h, and air cooling is to room temperature, then is carried out secondary ageing process, and aging temp is 460 DEG C, and temperature retention time is 3h, and air cooling is to room temperature；Being drawn to Φ 0.8mm on continuous drawing machine, deflection is 87.75%, pass deformation 5～8%, and argon shield is annealed online, and annealing temperature is 450 DEG C and stops 3s；Continuous electroplating silver；Being drawn to Φ 0.3mm again on continuous drawing machine, deflection is 86%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 450 DEG C and stops 3s；Repeating above-mentioned continuous drawing technique until being drawn to Φ 0.08mm, argon shield is annealed online, and annealing temperature is 500 DEG C and stops 2s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 533MPa, elongation percentage be 6.8%, electrical conductivity is the Φ 0.08mm silver-plated Cu-RE chromium zirconium silver alloy wire rod of 90.1%IACS。
Embodiment 6
Taking Φ 8mmCu-0.15wt.%Cr-0.4wt.%Zr alloy wire rod 5kg, carry out solution treatment in resistance furnace, solid solubility temperature is 960 DEG C, and temperature retention time is 40min, hardening；Wire rod after solid solution is cold drawn to Φ 1mm, and deflection is 98.5%, pass deformation 10～14%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out an Ageing Treatment, aging temp is 420 DEG C, is incubated 12h, and air cooling is to room temperature, then is carried out secondary ageing process, and aging temp is 480 DEG C, and temperature retention time is 3h, and air cooling is to room temperature；Being drawn to Φ 0.3mm again on continuous drawing machine, deflection is 91%, pass deformation 5～7%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 420 DEG C and stops 3s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 571MPa, elongation percentage be 6.1%, electrical conductivity is the Φ 0.3mm Cu-Cr-Zr alloy wire rod of 90.6%IACS。
Embodiment 7
Taking Φ 10mmCu-0.28wt.%Cr-0.07wt.%Zr-0.025wt.%Si alloy wire rod 5kg, carry out solution treatment in resistance furnace, solid solubility temperature is 950 DEG C, and temperature retention time is 1h, hardening；Wire rod after solid solution is cold drawn to Φ 1mm, and deflection is 99%, pass deformation 15～20%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out Ageing Treatment, aging temp is 425 DEG C, is incubated 3.5h, and air cooling is to room temperature；Continuous electroplating nickel；Being drawn to Φ 0.1mm again on continuous drawing machine, deflection is 99%, pass deformation 6～8%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 530 DEG C and stops 3s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 432MPa, elongation percentage be 8.9%, electrical conductivity is the Φ 0.1mm nickel-clad copper chromium zirconium silicon alloy wire rod of 93.7%IACS。
Embodiment 8
Taking Φ 6mmCu-0.25wt.%Cr-0.05wt.%Zr-0.025wt.%Ag-0.025wt.%Sn alloy wire rod 2kg, carry out solution treatment in resistance furnace, solid solubility temperature is 945 DEG C, and temperature retention time is 1h, hardening；Wire rod after solid solution is cold drawn to Φ 0.8mm, and deflection is 98.2%, pass deformation 11～16%；By traditional thread binding for the dish after cold drawn enter argon shield resistance furnace in, carry out Ageing Treatment, aging temp is 440 DEG C, is incubated 3h, and air cooling is to room temperature；Continuous electroplating silver；Being drawn to Φ 0.1mm again on continuous drawing machine, deflection is 98.4%, pass deformation 6～9%, makes the annealing furnace (such as tube furnace) of blanketing with inert gas, and argon shield is annealed online, and annealing temperature is 550 DEG C and stops 1s。
Use above compound thermomechanical treatment process, can obtain tensile strength to be 433MPa, elongation percentage be 15.8%, electrical conductivity is the Φ 0.1mm silver-plated copper chromium zirconium silver ashbury metal wire rod of 96.6%IACS。
The present invention to processing state alloy wire rod after solution treatment, carry out cold deformation largely to process, alloy carries out single-stage or multistage aging process subsequently, alloy conductive performance is made to be greatly improved and obtain higher intensity, make intensity improve further again through continuous cold deformation processing, realize the intensity of wire rod by single phase or multistage continuous annealing, elongation percentage, conductivity are in optimal synthesis state and make wire rod reach finished size。This process simplify the preparation processing technique of ageing strengthening type alloy wire, while saving material and the energy, ensure that the stability of wire quality。The diameter of the Cu-Cr-Zr system alloy wire obtained after present invention processing is 0.04～0.7mm, can be low to moderate 0.01mm。The superfine alloy wire strength prepared by the method up to 430～690MPa, elongation percentage more than 6%, corresponding conductivity up to 97%～70%IACS, the use needs of multi-field different combination property cable can be met。
Claims (10)
1. it is applicable to a compound deformation heat treatment method for Cu-Cr-Zr system alloy wire, comprises the steps:
(1) by the wire rod of Cu-Cr-Zr system alloy, as raw material line base；
(2) raw material line base is carried out solution treatment；
(3) the raw material line base after solution treatment pulls into dish line through multi-pass is cold drawn；
(4) carry out single-stage or multistage aging processes；When, in alloy, when alloy element mass percent sum≤0.4wt.% and 4≤Cr/Zr≤6, carrying out single-stage aging process；During alloy element mass percent sum > 0.4wt.% or Cr/Zr < 4, carry out two-stage time effect process；
(5) round or the processing of many rounds continuous cold and annealing are carried out。
2. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: in described Cu-Cr-Zr system alloy, Cr content is 0.15～0.6wt.%, Zr content is 0.03～0.4wt.%, and surplus is Cu。
3. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 2, it is characterized in that: described Cu-Cr-Zr system alloy is Cu-Cr-Zr-X alloy, Cr content is 0.15～0.6wt.%, Zr content is 0.03～0.4wt.%, X is one or more in Sn, Si, Ag and rare earth element, its content is 0.01～0.1wt.%, and surplus is Cu。
4. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: the cross-sectional diameter of described raw material line base is more than 6mm。
5. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: the solid solubility temperature of described raw material line base is 940～960 DEG C, and temperature retention time is 0.5～1h, then hardening。
6. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: the machining deformation amount of described multi-pass cold drawing is more than 85%, and pass deformation is 10～20%。
7. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: described single-stage aging processes, and the temperature of Ageing Treatment is 400～550 DEG C, and the time is 1～4h, air cooling。
8. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterized in that: described two-stage time effect processes, first aging temperature is 380～420 DEG C, temperature retention time is 8～16h, air cooling, the aging temperature of secondary is 450～480 DEG C, and temperature retention time is 1～4h, air cooling。
9. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1; it is characterized in that: the continuous cold worked machining deformation amount of every round is more than 60%; pass deformation is 5～10%; making the annealing furnace of blanketing with inert gas 400～550 DEG C of continuous annealings, wire rod is 1～3s through the time of body of heater uniform temperature zone。
10. the compound deformation heat treatment method being applicable to Cu-Cr-Zr system alloy wire as claimed in claim 1, it is characterised in that: after carrying out single-stage or multistage aging process, increase the step that dish line is carried out electrosilvering or nickel。
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